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Finding the Fourth Proportional to 153,448.90, 211,766.06 and 85,465.89

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Solution

The fourth proportional to 153,448.90, 211,766.06 and 85,465.89 is: 117,946.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,448.90 : 211,766.06 = 85,465.89 : x
  2. Step 2: Convert to fraction form
    153,448.90/211,766.06 = 85,465.89/x
  3. Step 3: Cross multiply
    153,448.90x = 211,766.06 × 85,465.89
  4. Step 4: Simplify right side
    153,448.90x = 18,098,775,003.36
  5. Step 5: Solve for x
    x = 18,098,775,003.36/153,448.90
  6. Step 6: Final answer
    x = 117,946.60

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.